diff options
Diffstat (limited to 'src/soc/intel/common')
| -rw-r--r-- | src/soc/intel/common/block/pmc/pmclib.c | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/src/soc/intel/common/block/pmc/pmclib.c b/src/soc/intel/common/block/pmc/pmclib.c index aa5b3621f1..d3a21a17fd 100644 --- a/src/soc/intel/common/block/pmc/pmclib.c +++ b/src/soc/intel/common/block/pmc/pmclib.c @@ -581,31 +581,38 @@ void pmc_gpe_init(void) void pmc_set_power_failure_state(const bool target_on) { - bool on; - const unsigned int state = get_uint_option("power_on_after_fail", CONFIG_MAINBOARD_POWER_FAILURE_STATE); + /* + * On the shutdown path (target_on == false), we only need to + * update the register for MAINBOARD_POWER_STATE_PREVIOUS. For + * all other cases, we don't write the register to avoid clob- + * bering the value set on the boot path. This is necessary, + * for instance, when we can't access the option backend in SMM. + */ + switch (state) { case MAINBOARD_POWER_STATE_OFF: + if (!target_on) + break; printk(BIOS_INFO, "Set power off after power failure.\n"); - on = false; + pmc_soc_set_afterg3_en(false); break; case MAINBOARD_POWER_STATE_ON: + if (!target_on) + break; printk(BIOS_INFO, "Set power on after power failure.\n"); - on = true; + pmc_soc_set_afterg3_en(true); break; case MAINBOARD_POWER_STATE_PREVIOUS: printk(BIOS_INFO, "Keep power state after power failure.\n"); - on = target_on; + pmc_soc_set_afterg3_en(target_on); break; default: printk(BIOS_WARNING, "WARNING: Unknown power-failure state: %d\n", state); - on = false; break; } - - pmc_soc_set_afterg3_en(on); } /* This function returns the highest assertion duration of the SLP_Sx assertion widths */ |